Preparation method of a novel long-acting disinfectant using polyvinyl alcohol as a macromolecule retarding material

Abstract

The invention designs a preparation method of a novel long-acting sanitizer taking polyvinyl alcohol as a macromolecule retardant material. The preparation method comprises the following steps of: stirring and mixing a complete alcoholysis type polyvinyl alcohol solution with a sanitizer, namely dichloro dimethyl hydantoin, subsequently freezing for 24 hours at low temperature, taking out and thawing so as to obtain piece-shaped polyvinyl alcohol gel; and cutting the gel into small pieces and drying so as to obtain the novel long-acting sanitizer which takes polyvinyl alcohol as the continuous phase and sanitizer grains are dispersed therein. When the long-acting sanitizer is used, the polyvinyl alcohol absorbs water to swell up, however, the framework is not dissolved and disintegrated, the sanitizer is slowly released, the residual chlorine value in a water body is stable, and the slow-release time can be more than 30 days; and when dichloro dimethyl hydantoin is completely released, the piece-shaped polyvinyl alcohol retardant material can be taken out from the water body, so that the water body is not polluted.

Description

technical field [0001] The invention relates to a preparation method of a novel long-acting disinfectant using polyvinyl alcohol as a macromolecule retarding material. Background technique [0002] Common disinfectants currently on the market, such as hypochlorite, sodium dichloroisocyanurate and trichloroisocyanuric acid, generally have the problem of poor slow-release properties. When these disinfectants are in use, when the one-time dosage is large, the residual chlorine value in the water body will be too high, causing a strong chlorine smell in the water body, and the high oxidation value is also harmful to health. Therefore, it needs a small amount of input many times to control the residual chlorine value in the water. It is cumbersome to use and is not suitable for use in the army, in the field, in rural water cellars and other places. [0003] The slow-release technology of mixing disinfectants with polymer compounds has been widely used in drinking water disinfect...

AI Technical Summary

Problems solved by technology

[0002] Common disinfectants currently on the market, such as hypochlorite, sodium dichloroisocyanurate and trichloroisocyanuric acid, generally have poor slow-release properties

When these disinfectants are used, when the one-time dosage is large, the residual chlorine value in the water body will be too high, causing a strong chlorine smell in the water body, and an excessively high oxidation value is also harmful to health.

Therefore, a small amount of input is required to control the residual chlorine value in the water. It is cumbersome to use and is not suitable for use in the army, in the field, in rural water cellars, etc.